JP6203108B2 - Ventilation fan - Google Patents

Description

  The present invention relates to a ventilation fan provided with various sensors such as a shutter and a human sensor that are electrically controlled to open and close.

  Some ventilating fans include a shutter that is electrically opened and closed on the front side of the flange of the blower body, for example. As this type of ventilation fan, for example, as disclosed in Patent Document 1, there is one in which a control board serving as an operation control unit is arranged on an upper part of a product.

JP 2008-24110 A

  According to the above-mentioned Patent Document 1, there is a description that a ventilation fan capable of reducing the size of the control board is obtained, and a large number of mounting parts can be arranged. However, the control board is only equipped with components related to the shutter, and when a human sensor or a sensor for detecting humidity, temperature, gas, or the like is mounted on the ventilation fan, the ventilation fan disclosed in Patent Document 1 is used. Since there is a space only on the lower side of the product (see FIG. 3 of the same document 1), it is necessary to mount a substrate divided on the lower side of the product when mounting the sensor. In addition, when the above sensors are installed on the upper side of the product, the indoor air environment for detecting humans or detecting humidity, temperature, gas, etc. is detected by the air flow of the ventilation fan below the installation position. Since it is obstructed, it leads to a decrease in detection performance. For this reason, since it is desirable to arrange | position said sensors below a product, there exists a subject that some board | substrates must be arrange | positioned below.

  The present invention has been made to solve the above-described problems, and prevents water from entering the electronic components constituting the operation control unit, and is a product without dividing the control board on which the electronic components are mounted. An object is to obtain a ventilation fan that can reduce the processing cost due to the increase in assembly parts generated by dividing the board and the parts that protect them by making it possible to concentrate on the lower side.

  A ventilation fan according to the present invention is provided continuously to a wind tunnel composed of a cylindrical resin member, a blower disposed in the wind tunnel, and an outer peripheral portion of an indoor opening of the wind tunnel, and projects outward in the radial direction. And a front structure having a flange rising portion provided at an end edge of the flange portion and protruding toward the back side, a shutter attached to the front surface of the flange portion so as to cover the air channel, and the shutter And a control board disposed below the wind tunnel, and at least the control board on the rear side, mounted with a shutter drive section for opening and closing the door, and at least an electronic control unit for controlling the blower and the shutter drive section. An insulating cover that covers the control board by the flange portion, the flange rising portion, and the insulating cover. Configured, in the upper portion of the control board housing unit, in which the junction between the insulating cover the flange portion labyrinth structure.

  According to the present invention, by adopting the above configuration, it is possible to prevent water intrusion into the electronic component of the control board, so that the control board on which the electronic component is mounted is concentrated on the lower side of the product without being divided. It becomes possible to do. For this reason, it is possible to reduce the processing cost due to the increase in assembly parts generated by dividing the board and the parts for protecting them.

It is sectional drawing of the ventilation fan which concerns on Embodiment 1 of this invention. It is the front view and back view of the ventilation fan of FIG. It is a back surface disassembled perspective view in the insulating cover of the ventilation fan of FIG. It is BB sectional drawing of the ventilation fan of FIG. It is a figure which shows the flow of the dew condensation water at the time of wall and ceiling attachment of the ventilation fan of FIG. It is the perspective view which showed the shutter attachment part of the ventilation fan of FIG. It is a front view of the shutter of the ventilation fan of FIG. It is a perspective view explaining attachment and removal of the shutter of FIG. It is a rear view which shows the state before attaching the insulating cover of the ventilation fan of FIG.

Embodiment 1 FIG.
1 to 9 are schematic views of a ventilation fan according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view showing an attached state of a ventilation fan according to Embodiment 1 of the present invention, and FIGS. 2A and 2B are a front view and a rear view of the ventilation fan of FIG. FIG. 3 is an exploded rear perspective view of the insulating cover of the ventilating fan of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB of FIG. FIG. 5 is a diagram showing the flow of condensed water when the wall and ceiling of the ventilation fan of FIG. 1 are attached. 6 is a perspective view showing a shutter mounting portion of the ventilating fan of FIG. 1, FIG. 7 is a front view of the shutter of the ventilating fan of FIG. 1, and FIG. 8 is a perspective view explaining attachment and removal of the shutter of FIG. FIG. 9 is a rear view showing a state before the insulating cover of the ventilation fan of FIG. 1 is attached. In the present invention, the vertical direction indicates the vertical direction in a state where the ventilation fan is attached to the wall surface (FIG. 1). Hereinafter, the structure of the ventilation fan according to the present embodiment will be described with reference to these drawings.

  The ventilation fan according to the present embodiment is inserted and installed from the indoor side into a pipe 1 (see FIG. 1) or a duct (not shown) that communicates indoors and outdoors. As shown in FIG. 1, the ventilation fan is assembled with a blower 31 including a propeller impeller 4 and an electric motor 5 on a resin-made main body frame 3 having a cylindrical wind tunnel 2 inserted into a pipe 1 or the like. The main body 6, the decorative panel 7, and the shutter 16 are provided. In the main body frame 3, a front structure 32 is integrally formed at the mouth edge portion of the bell mouth-shaped opening portion 8 serving as a suction port at the front portion of the wind tunnel 2. The front structure 32 is formed in a substantially square (or round) flange portion 9 that projects in the radial direction and has a flat surface portion, and protrudes toward the back side at the edge of the flange portion 9. It consists of a flange rising portion 10 that abuts.

A control board 21 for operating the shutter 16 and a sensor 22 suitable for the application are accommodated on the rear surface of the flange portion 9. Electronic components of an operation control unit that controls the operation of the electric motor 5 and the solenoid 34 (see FIG. 2) are mounted on the control board 21. Of the electronic components on the control board 21, a strong electrical component (for example, a power supply circuit (not shown), a circuit component that drives the motor 5 and the solenoid 34) is a sheet metal fire spread prevention cover 23 as a measure to prevent the fire spread. Covered and protected by. As described above, since the high-power components are covered with the fire spread prevention cover 23, even if a fire occurs, the fire spread can be prevented. The fire spread prevention cover 23 corresponds to the protective cover of the present invention.
In addition, an insulating cover 18 is provided to prevent an electric shock due to contact with the control board 21 (see FIGS. 1 to 3). In other words, the insulating cover 18 covers the back side of the sensor 22, the low-power component of the control board 21 (for example, a component used for arithmetic processing) and the fire spread prevention cover 23.
Further, on the back surface of the flange portion 9, a terminal block 17 is installed that can be easily connected to an external power supply wire with a rotary structure.

  The blower 31 is attached to an electric motor attachment structure 33 provided outside the wind tunnel 2 of the main body frame 3. The motor mounting structure 33 includes four leg portions 11 extending rearward along the center line direction of the wind tunnel 2 at intervals in the circumferential direction, and a bridge extending radially inward from the end portion of each leg portion 11. It consists of the part 12 and the motor cover 13 supported by the center of the wind tunnel 2 by the bridge part 12 (refer FIG. 1, FIG. 2). The four legs 11 are all on the inner side of the outer periphery of the wind tunnel 2, and a leaf spring 14 with a warp is mounted on the outer side of one of them. The leaf spring 14 holds the main body 6 in the pipe 1 (or in the duct) by the expanding elastic force in the radial direction. The motor 5 is fixed to the motor mounting structure 33 by screwing so that the rotary shaft 15 protrudes from the tip of the motor cover 13 onto the center line of the wind tunnel 2 at the flange of the outer shell. And the impeller 4 is mounted | worn with the rotating shaft 15 extended on the centerline in the wind tunnel 2 of the electric motor 5 with the form enclosed by the wind tunnel 2 (refer FIG. 1).

  The decorative panel 7 has an inner structure that covers the flange portion 9 and the flange rising portion 10 that are the front structure 32 of the main body frame 3, and is attached to the main body 6 by claw fitting (see FIGS. 1 and 2).

  As shown in FIG. 7, the shutter 16 has a shutter frame 19 and a shutter blade 20. As shown in FIG. 8, the shutter 16 slides the front surface of the flange portion 9 from the right to the left side, and hooks the edge 19 b of the shutter frame on the hook-shaped hook portion 9 a provided on the front surface of the flange portion 9. Thus, the shutter 16 can be attached. Further, when the shutter 16 is slid to the normal position, the projection 9b formed on the front surface of the flange portion 9 is engaged with the engagement hole 19a (see FIG. 7) formed in the shutter frame 19. The shutter 16 is locked to the flange portion 9.

  The shutter 16 is opened and closed by a solenoid 34 installed at the upper part on the back side of the main body frame 3. The solenoid 34 includes a movable iron core (not shown), and moves the shutter pull-up component 24 (see FIG. 6) attached to the tip of the movable iron core in one direction. The shutter pull-up component 24 protrudes from the through hole 9 c of the flange portion 9, and moves by the suction force of the solenoid 34 to open and close the shutter blade 20 of the shutter 16. The solenoid 34 and the shutter lifting component 24 correspond to the “shutter drive unit” of the present invention.

  As shown in FIGS. 3 and 4, the control board 21 is disposed under the main body 6 on the back side of the flange portion 9 while being protected by the fire spread prevention cover 23, and includes the flange portion 9 and the flange rising portion 10. The space formed by the insulating cover 18, that is, the control board storage portion 28 is housed and insulated. A sensor 22 is disposed adjacent to the control board 21. The sensor 22 can detect a person's movement or humidity, temperature, gas, or the like. When the person is detected or when the indoor environment reaches a set humidity, temperature, gas concentration, or the like, the control board 21. By transmitting information to, control for operating or stopping the ventilation fan is performed. The sensor 22 corresponds to the “sensor for detecting the indoor state” of the present invention.

  As shown in FIG. 5, the control board storage portion 28 is provided with two ribs 9 d and 9 e on the back surface of the flange portion 9 and a slit 18 a on the insulating cover 18 in order to prevent water from entering. ing. The control board housing portion 28 employs a labyrinth structure 35 in which the insulating cover 18 and 18a enter between the two ribs 9d and 9e. When the ventilation fan is attached to the wall, the insulating cover 18 has a gradient provided to release the mold so that the dew condensation water flows to the opposite side of the labyrinth structure 35 as shown in FIG. . For this reason, water flows outward from the labyrinth structure 35 without entering. Of the two ribs 9d and 9e, the rib 9d is disposed on the upper side of the product, and the rib 9e is disposed on the lower side of the product. When the ventilation fan is mounted on the ceiling instead of the wall, the height (length) of both ribs prevents the water from entering the control board storage portion 28 even if water accumulates on the rear surface of the flange portion 9. Is the product lower rib 9e> product upper rib 9d. Further, a hole 9f is formed in the flange portion 9 so that water does not accumulate beyond the height of the rib 9e on the lower side of the product, so that water can be removed. The insulating covers 18a 18a correspond to the “end portion of the insulating cover toward the flange side” of the present invention.

  As shown in FIG. 9, the control board 21 is electrically connected to the electric motor 5, the solenoid 34, and the terminal block 17 by electric wires 25 to 27. As described above, electronic components of an operation control unit for driving the electric motor 5 and the solenoid 34 are mounted on the control board 21. The electric wire 25 is an electric wire that connects the electric motor 5 and the control board 21, the electric wire 26 is an electric wire that connects the solenoid 34 and the control board 21, and the electric wire 27 is an electric wire that connects the terminal block 17 and the control board 21. The control board 21 (operation control unit) controls the electric motor 5 and the solenoid 34 by controlling with the voltage applied from the terminal block 17. The rotation speed of the electric motor 5 is controlled based on the output of the sensor 22, for example. The solenoid 34 is controlled so as to close the shutter 16 when the electric motor 5 is stopped and open the shutter 16 when the electric motor 5 is operated. The electric wires 25 to 27 are provided on the fire spread prevention cover 23 from the lower side of the product so that the condensed water does not enter the control board 21 through the rib 9k on the back surface of the flange portion 9 and the insulating cover 18 from the upper part of the product. It passes through the cut-out portion 23a and is connected to the control board 21 by solder.

  Said electric wires 25-27 are comprised from the flame-retardant electric wire protection tube 29 with elasticity, and the electric wire 29a in the electric wire protection tube 29 (refer FIG. 4). For this reason, when passing through the rib 9k on the back surface of the flange portion 9 and the insulating cover 18, the electric wire 29a is crushed to the extent that the wire 29a is not damaged, and this also prevents water from entering. Further, ribs 9g and 18b formed on both the back surface of the flange portion 9 and the insulating cover 18 are provided between the control board 21 and the electric wires 25 to 27, and the control board 21 and the electric wires 25 to 27 are provided. Are isolated so as not to contact each other (see FIGS. 4 and 5). Such a configuration prevents water from adhering to the control board 21 even if water adheres to the electric wires 25 to 27. Even if water enters the control board housing portion 28 through the electric wires 25 to 27, the structure does not allow water to flow into the control board 21 by the above two means. Further, a water drain hole 9h is provided so that water can be drained when water accumulates on the bottom surface of the control board storage section 28.

  When the ventilation fan is mounted on the ceiling, the wires 25 to 27 are lifted from the back surface of the flange portion 9 by the rib 9k formed on the back surface of the flange portion 9 as shown in FIG. The trap 28 is provided so that water does not enter the portion 28. As described above, for the water transmitted through the electric wires 25 to 27, the trap structure described above can prevent water from entering the control board housing portion 28 (that is, the control board 21). The rib 9k is formed on the front side (upper part) of the insulating cover 18 in the direction in which the electric wires 25 to 27 are directed to the control board 21. As long as the position of the rib 9k is above the insulating cover 18, the position is not limited to the illustrated position.

  As shown in FIG. 4, the sensor 22 is connected to the control board 21 via a connection terminal 22 b via an electric wire 22 a, transmits the detected information to the control board 21, and uses a control component mounted on the control board 21 to provide a ventilation fan. Control for operating or stopping the (motor 5) is performed. The sensor 22 is arranged side by side with the control board 21. With this arrangement, the insulating cover 18 can cover not only the control board 21 but also the sensor 22. For this reason, the control board 21 and the sensor 22 can be insulated with a single component of the insulating cover 18. Further, the sensor storage portion 30 that stores the sensor 22 can also prevent water intrusion by adopting the labyrinth structure 35.

  Although the sensor 22 is exposed to the indoor environment in terms of its function, as shown in FIG. 4, the partition wall 9 j formed from the back surface of the flange portion 9 and the partition wall 18 c formed on the insulating cover 18 Thus, it is possible to separate the environment from the control board housing portion 28 that houses the control board 21, and it is possible to protect the environment of the control board 21.

As described above, according to the present embodiment, the use of the labyrinth structure 35 including the ribs 9d and 9e on the back surface of the flange portion 9 and the insulating covers 18a allows water to enter the control board storage portion 28. Can be prevented. For this reason, there is no need to divide the control board as in the conventional case, and the number of wires, the tubes that protect the wires, the insulating cover that insulates each divided control board, etc. Can be reduced, the assembly is facilitated, and the number of parts can be reduced.
In the above-described embodiment, an example in which both the shutter 16 and the sensor 22 are provided has been described. However, the present invention is also applicable to one provided with either one.

  1 pipe, 2 wind tunnel, 3 body frame, 4 impeller, 5 motor, 6 body, 7 decorative panel, 8 opening, 9 flange, 9a hook, 9b protrusion, 9c through-hole, 9d upper rib, 9e Lower rib, 9f hole, 9g rib (tube contact prevention rib), 9h Drain hole in control board storage part, 9j Bulkhead, 9k rib, 10 Flange rising part, 11 Leg part, 12 Bridge part, 13 Motor cover , 14 Leaf spring, 15 Rotating shaft, 16 Shutter, 17 Terminal block, 18 Insulating cover, 18a, 18b Rib (tube contact prevention rib), 18c Bulkhead, 19 Shutter frame, 19a Engagement hole (lock hole), 19b Shutter Frame edge, 20 Shutter blade, 21 Control board, 22 Sensor, 22a Electric wire, 22b Connection terminal, 23 Fire spread prevention Bar, 23a Notch, 24 Shutter lifting parts, 25-27 Electric wire, 28 Control board storage, 29 Electric wire protection tube, 29a Electric wire, 30 Sensor storage, 31 Blower, 32 Front structure, 33 Motor mounting structure, 34 Solenoid , 35 Labyrinth structure.

Claims (9)

A wind tunnel composed of a cylindrical resin member;
A blower disposed in the wind tunnel;
A front structure having a flange portion continuously provided on an outer peripheral portion of the indoor side opening of the wind tunnel and projecting radially outward, and a flange rising portion provided on an end edge of the flange portion and projecting to the back side; ,
A shutter attached to the front surface of the flange portion so as to cover the wind tunnel;
A shutter drive for opening and closing the shutter;
At least electronic components of an operation control unit that controls the blower and the shutter drive unit are mounted, and a control board disposed below the wind tunnel,
An insulating cover that covers at least the control board from the back side;
It said flange portion, by the flange rising portion and the insulating cover, constitute a control board housing unit for accommodating the control board,
In the upper portion of the control board housing unit, ventilators, characterized in that the connecting portion between the insulating cover and the flange portion in the labyrinth structure. It is further equipped with a sensor that detects indoor conditions,
In addition to the control board, the insulating cover covers the sensor,
The ventilation fan according to claim 1, wherein the electronic component mounted on the control board controls the blower based on an output of the sensor. A wind tunnel composed of a cylindrical resin member;
A blower disposed in the wind tunnel;
A front structure having a flange portion continuously provided on an outer peripheral portion of the indoor side opening of the wind tunnel and projecting radially outward, and a flange rising portion provided on an end edge of the flange portion and projecting to the back side; ,
A sensor that detects indoor conditions,
An electronic component of an operation control unit that controls the blower based on a signal from the sensor is mounted, and a control board disposed below the wind tunnel,
And an insulating cover at least covering the control board and the sensor from the rear side,
It said flange portion, by the flange rising portion and the insulating cover, constitute a control board housing unit for accommodating the control board,
In the upper portion of the control board housing unit, ventilators, characterized in that the connecting portion between the insulating cover and the flange portion in the labyrinth structure. The labyrinth structure of the control board storage part is
A pair of ribs formed on the back surface of the flange portion so as to protrude on the back surface side, and an end portion of the insulating cover facing the flange portion side, and the end portion is inserted between the pair of ribs; The ventilation fan as described in any one of Claims 1-3 characterized by the above-mentioned. The pair of ribs includes a product upper rib and a product lower rib, and the length thereof is
The ventilation fan according to claim 4, wherein a relation of a product upper rib <a product lower rib is established.   The ventilating fan according to any one of claims 1 to 4, further comprising a metal protective cover that covers high-power components among the control components of the control board to prevent the spread of fire. The ventilation fan according to claim 6 , wherein an electric wire connected to the high-power component of the control board is connected to the control board through a notch provided in a lower part of the protective cover. The electric wire connected to the high-power component of the control board is partially lifted by a rib formed on the back surface of the flange portion at an upper end portion of the insulating cover or an upper portion thereof. A ventilation fan as described in 1. A sensor housing for housing the sensor;
The ventilation fan according to claim 2 or 3, wherein the sensor storage section and the control board storage section are formed by partitioning the spaces.

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